Table $6\mathrm{.}2$

A company makes four products that have the following characteristics: Product A sells for $$75$ but needs $$20$ of materials and

$$20$ of labor to produce; Product B sells for $$90$ but needs $$45$ of materials and $$20$ of labor to produce; Product C sells for

$$110$ but needs $$50$ of materials and $$30$ of labor to produce; Product $D$ sells for $$135$ but needs $$75$ of materials and $$40$ of

labor to produce. The processing requirements for each product on each of the four machines are shown in the table.

Work centers W$,$ X$,$ Y$,$ and Z are available for $40$ hours per week and have no setup time when switching between products.

Market demand is $50As,60Bs,70Cs,$ and $80Ds$ per week. In the questions that follow, the traditional method refers to

maximizing the contribution margin per unit for each product, and the bottleneck method refers to maximizing the contribution

margin per minute at the bottleneck for each product.

Use the information in Table $6\mathrm{.}2.$ Using the bottleneck method, in what sequence should products be scheduled for production?

A$,$ D$,$ B$,$ C

D$,$ A$,$ B$,$ C

A$,$ D$,$ C$,$ B

D$,$ A$,$ C$,$ B